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CBN Grade for Turning Hardened Steel

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Excellent Coated CBN Grade That
Building New Age of Turning Hardened
Steels

New PVD Coating with Ideal Balance of Wear and Chipping Resistance

BC8220 utilises a new specially developed, super multi-layer ceramic PVD coating. The high level of both chipping and wear resistance is achieved by a much improved adhesion between the substrate
and coating. Together with the easy identification of use due to the gold coloured TiN top coating layer,
BC8220 achieves high performance and reliability over a wide range of hardened steel machining
applications.

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Newly developed CBN substrate featuring toughness and crater wear resistance

The new CBN substrate contains a new ultra-fine grain, heat resistant binder.
This suppresses both chipping and crater wear that promotes longer tool life.

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Positive Effect of the Newly Developed Heat Resistant Binder

The progress of crater wear is greatly reduced due to the use of a heat resistant binder.
This suppresses chipping, crater wear and fracturing.

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Optimised Substrate Technology - The Ultra Micro-Particles Binder -

The ultra micro-particles binder prevents linear crack development to avoid sudden fracturing.

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Area of Application

BC8220 is ideal for both high speed and interrupted cutting and expands the application area of
conventional grades.

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Edge Preparation (Honing)

New VA honing type with improved fracture resistance for high speeds and feed.

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Combination of BF Breaker and WS Wiper Insert

CNGM and DNGM types are now available with new inserts that combine a BF chip breaker with a WS
wiper Insert. (BF-oNGMooooooTAWS2)
It is effective for chip control and improvement of finished surface roughness without worrying about the
hand of the tool even in continuous external turning or internal turning and facing.

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Machining SCr420 (60 HRC): Comparison of Wear Resistance During Continuous Cutting

BC8220 achieves excellent wear resistance and finished surface when compared to conventional products.

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Machining SCr420 (60 HRC): Comparison of Surface Roughness During Continuous Cutting

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Machining SCr420 (60 HRC): Comparison of Fracture Resistance During Low Interrupted Cutting

BC8220 has excellent chipping and fracture resistance.

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